Past tense for uncertainty, and the problem with too & either.

Okay, I was told that Galaxy and Albatron might cooperate with ATI in order to publish ATI's display card products. However, I am in doubt with this statement. So when I am telling my friend this news, and I want to show my uncertain feeling, I can say " Galaxy and Albatron was going to cooperate with ATI for display card selling." Am I right? If so, when I am certain with something or think that it has a high possibility, then I should rather use "is" instead,right --- "Galaxy and Albatron is going to cooperate with ATI for display card selling."

Then my second question, I was told that when we are saying something negative, we should use either instead of too.

For example :

I don't like to go swimming too! <--- Wrong?

I don't like to go swimming either! <--- Correct?

Or we are able to use either one of them in both situations?

Million Thanks for your valuable answer!!